... Rated Voltage:660V,DC voltage 440V. 1.ApplicationLAY39-22 series button switch, adapted in AC 50HZ( or 60HZ), voltage ... is up to 440V, used for control, signals, reverse function in CNC machine tools, shipbuilding, textiles, printing, electrical ... buttonPLevel buttonYKey buttonPDFlat button with light buttonSWDouble-buttonZPSelf lock level buttonMMushroom buttonZPDSelf-locking type flat button with ...